"Must be reasonally available by surface transportation"

It is what it is. Never give them a time that you can be there. Just ask if they put the trip on your schedule. For me there is no sign in time on reserve. I get there when I get there. I don't care if they said it leaves in 30 minutes.
Some guys live in Orlando and will straight up tell the scheduler, put me on a plane or it's gonna take me awhile to drive.
I've spoken with several pilots that got harrassed when they told scheduling 4 hours. So, never tell them a time. You don't know. You don't know what traffic on I95 is like. You will get there when you get there.
For those hoping of being a new hire and commuting to reserve, you will be miserable. If you do not live (rent or own) in base you made your bed, don't wine about it.